Design, calibration and testing of a thin film temperature gauge array for temperature and heat flux measurements in fluid mixing experiments

Design and development of resistive temperature detector arrays on aluminium substrates. Measurements in mixing experiments

“…The connection among these resistive elements is obtained by means of thin films of evaporated gold. The resulting sizes are slightly smaller than its preceding version [20].…”

“…The presented temperature sensor is a variant of the one introduced in [20]. Different materials were used either for the substrate or the coating layer.…”

“…In order to understand the mechanism of frequency response of structures to fluid temperature fluctuations, wall structures subjected to sinusoidal temperature were studied [19]. A previous work has been carried out with RTDs on a glass substrate [20], proving that they are capable of characterizing temperature fluctuations in the frequency range of interest, but the substrate is thermally non-conductive as the structures of the real pipes and it has proven to be mechanically fragile. This work presents an array of temperature sensors produced on a metallic substrate, which leads to more realistic conditions as well as further results obtained from mixing experiments.…”

Long-duration heat load measurement approach by novel apparatus design and highly efficient algorithm

“…They can only be used for low heating rate areas without water-cooling. There are also thin film heat flux gauges [3,[11][12][13][14][15] or thermopiles [16] for heat load measurements, which only apply to low heating rate situations (usually <50 kW m −2 ) or very short heating duration cases.…”

Resistive Electrothermal Sensors, Mechanism of Operation and Modelling

“…For the same values of the electrical parameters, this self-heating is more important as the sensor is small, and therefore this phenomenon is a major source of errors in the thermal measurements when using miniature resistive sensors. To quantify this deviation, sensors manufacturers usually measure a steady-state self-heating index (SHI) [4], that is only valid for one given operating temperature and one given surrounding environment, such as air or water for example.…”